updated swagger core and swagger parser versions, also added tests to confirm that issue #7980 is solved with these changes.

Author: HugoMario

modules/swagger-codegen/src/test/java/io/swagger/codegen/CodegenTest.java

@@ -1,6 +1,7 @@
 package io.swagger.codegen;
 
 import io.swagger.models.Model;
+import io.swagger.models.ModelImpl;
 import io.swagger.models.Operation;
 import io.swagger.models.Swagger;
 import io.swagger.models.properties.Property;
@@ -431,4 +432,12 @@ public void deprecatedParamTest() {
 
         Assert.assertTrue(op.isDeprecated);
     }
+
+    @Test(description = "https://github.com/swagger-api/swagger-codegen/issues/7980")
+    public void testPattern() throws Exception {
+        final Swagger swagger = parseAndPrepareSwagger("src/test/resources/2_0/petstore.yaml");
+        ModelImpl currency = (ModelImpl) swagger.getDefinitions().get("Currency");
+        Assert.assertNotNull(currency);
+        Assert.assertEquals(currency.getPattern(), "^[A-Z]{3,3}$");
+    }
 }

modules/swagger-codegen/src/test/resources/2_0/petstore.yaml

@@ -702,6 +702,29 @@ definitions:
         type: string
       message:
         type: string
+  #issue: https://github.com/swagger-api/swagger-codegen/issues/7980
+  Amount:
+    type: object
+    description: >
+      some description
+    properties:
+      value:
+        format: double
+        type: number
+        minimum: 0.01
+        maximum: 1000000000000000
+        description: >
+          some description
+      currency:
+        $ref: '#/definitions/Currency'
+    required:
+      - value
+      - currency
+  Currency:
+    type: string
+    pattern: '^[A-Z]{3,3}$'
+    description: >
+      some description
 externalDocs:
   description: Find out more about Swagger
   url: 'http://swagger.io'

pom.xml

@@ -933,10 +933,10 @@
         </repository>
     </repositories>
     <properties>
-        <swagger-parser-version>1.0.34</swagger-parser-version>
+        <swagger-parser-version>1.0.36-SNAPSHOT</swagger-parser-version>
         <scala-version>2.11.1</scala-version>
         <felix-version>3.3.0</felix-version>
-        <swagger-core-version>1.5.18</swagger-core-version>
+        <swagger-core-version>1.5.20-SNAPSHOT</swagger-core-version>
         <commons-io-version>2.4</commons-io-version>
         <commons-cli-version>1.2</commons-cli-version>
         <junit-version>4.8.1</junit-version>